function createRequestObject(){
	var req;
	try {
		// Firefox, Opera, Safari
		req = new XMLHttpRequest();
	}
	catch (e) {
	// Internet Explorer
		try {
	// For IE 6
			req = new ActiveXObject("Msxml2.XMLHTTP");
		} 
		catch (e) {
			try {
	// For IE 5
				req = new ActiveXObject("Microsoft.XMLHTTP");
			} 
			catch (e) {
				alert('Your browser is not IE 5 or higher, or Firefox or Safari or Opera');
			}
		}
		}
	return req;
}
// Make the XMLHttpRequest Object
var http = createRequestObject();

function sendRequest(method, url){
	if(method == 'get' method == 'GET'){
		http.open(method,url,true);
		http.onreadystatechange = handleResponse;
		http.send(null);
	}
}

function handleResponse(){
	if(http.readyState == 4 && http.status == 200){
		var response = http.responseText;
		if(response){
			document.getElementById("ajax_res").innerHTML = response;
		}
	}
}

function toggleType(){
	var dropdown = document.newsession_form.sessiontype;
	var myindex = dropdown.selectedIndex;
	var type = dropdown.options[myindex].value;
    if(type == "user"){
    	document.newsession_form.group.disabled = true;
    	document.newsession_form.usersingroup.disabled = true;
    	document.newsession_form.user.disabled = false;
    }
    else
        {
    	document.newsession_form.group.disabled = false;
    	document.newsession_form.usersingroup.disabled = false;
    	document.newsession_form.user.disabled = true;
        }
};